To accurately complete the blank, we will analyze the context and the provided options. The question references 'Boro', 'Aman', and 'Aus', which are terms associated with a specific agricultural context. Let's review the options provided:
'Boro', 'Aman', and 'Aus' are recognized as types of rice crops cultivated in various seasons and geographical areas within India. Specifically:
These terms are unrelated to tribal groups, folk dances, or cotton crops. Therefore, based on this evaluation, the correct option is: Names of rice crops